// Copyright (c) Appeon. All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. 
// You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0.

using System;
using System.Collections.Generic;
using System.Data;
using JetBrains.Annotations;
using Microsoft.Data.Sqlite;

namespace SnapObjects.Data.Sqlite
{
    internal class SqliteAdoDbCommand : AdoDbCommand
    {
        public SqliteAdoDbCommand(
            [NotNull] string sqlText,
            IEnumerable<IAdoDbParameter> parameters,
            bool addExceptionToTransaction,
            CommandType commandType = CommandType.Text)
            : base(sqlText, parameters, addExceptionToTransaction, commandType)
        {
        }

        protected override string BuildNoExecCommandText(DataContext context, string commandText)
        {
            return $"explain query plan {commandText}";
        }

        protected override void CreateParameters(DataContext dataContext, IDbCommand command)
        {
            base.CreateParameters(dataContext, command);
            var connection = dataContext.CurrentConnection;
            if (dataContext.CurrentTransaction != null &&
                connection.CurrentTransaction.DbTransaction.Connection == null)
            {
                command.Transaction = null;
            }
        }

        protected override int GetSqlDbCode(Exception innerException)
        {
            if (innerException is SqliteException ex)
            {
                return ex.SqliteErrorCode;
            }

            return -1;
        }
    }
}
